55545144 has 32 divisors (see below), whose sum is σ = 140939520. Its totient is φ = 18238176.

The previous prime is 55545109. The next prime is 55545157. The reversal of 55545144 is 44154555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15664 + ... + 18879.

It is an arithmetic number, because the mean of its divisors is an integer number (4404360).

Almost surely, 2^55545144 is an apocalyptic number.

It is an amenable number.

55545144 is an abundant number, since it is smaller than the sum of its proper divisors (85394376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55545144 is a wasteful number, since it uses less digits than its factorization.

55545144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34619 (or 34615 counting only the distinct ones).

The product of its digits is 40000, while the sum is 33.

The square root of 55545144 is about 7452.8614638943. The cubic root of 55545144 is about 381.5475761834.

Adding to 55545144 its reverse (44154555), we get a palindrome (99699699).

The spelling of 55545144 in words is "fifty-five million, five hundred forty-five thousand, one hundred forty-four".